1 Program in Health Services & Systems Research, Duke NUS Medical School, 169857, Singapore; Department of Medicine, Aga Khan University, Karachi, Pakistan; Duke Global Health Institute, Duke University, Durham, NC USA. Electronic address: tazeen.jafar@duke-nus.edu.sg.
2 Department of Medicine, Aga Khan University, Karachi, Pakistan; Division of Cardiology, Duke University, Durham, NC, USA.
3 Division of Cardiology, Duke University, Durham, NC, USA; Duke Global Health Institute, Duke University, Durham, NC USA.